# US 11,441,286 B2 · Chair for supporting reinforcing elements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,286 B2 - Document ID: US11441286B2 - Status: Granted - Kind: B2 - Application number: 16/818,974 - Filed: 2020-03-13 - Published: 2020-09-17 - Granted: 2022-09-13 - Earliest claimed: 2019-03-16 - Applicants: Oscar Sotelo - Inventors: Oscar Sotelo - Web page: https://patentgrep.com/patent/US11441286B2 ## CPC - E02D 27/016: {made mainly from prefabricated concrete elements} - A47C 5/00: Chairs of special materials - E04C 5/168: {Spacers connecting parts for reinforcements and spacing the reinforcements from the form} - E04C 5/20: of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires {(E04C5/168 takes precedence)} - E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)} - A47C: CHAIRS; SOFAS; BEDS - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) ## Abstract A concrete chair elevates rebar above an underlying surface. The chair includes a rectilinear rim having a length, width and height of different distance. The rim may be oriented so each side abuts the underlying surface so rebar can be supported at three different heights above the underlying surface. In a foundation pour, the chair supports rebar at three different elevations. In a tilt wall pour, the chair supports rebar at three different elevations and produces a mark on the cured wall of considerably reduced extent. ## Claims ### Claim 1 A chair for supporting reinforcing elements in a concrete pour on an underlying surface in a foundation pour mode and in a tilt wall pour mode, comprising a rim including first walls and second walls intersecting the first walls, the walls bounding a cavity; a first of the first walls and a first of the second walls being configured to sup ort the rim on the underlying surface in response to orientation of the rim relative to the underlying surface, a second of the first walls and a second of the second walls each providing an outwardly facing depression configured to receive and support a concrete reinforcing element at different distances from the underlying surface in response to different orientations of the rim relative to the underlying surface in a foundation pour mode; and only the first of the first walls having a pair of spaced first feet extending away therefrom; only a first of the second walls having a pair of second feet extending away therefrom; the first feet being configured to raise the first of the first walls above the underlying surface when the first of the first walls adjoins the underlying surface and the second feet being configured to raise the first of the second walls above the underlying surface when the first of the second walls adjoins the underlying surface, the first and second feet being configured to position the reinforcing elements at different distances from the underlying surface in a tilt wall pour mode. ### Claim 2 (depends on 1) The chair of claim 1 further comprising spaced third feet located at a junction of the first and second walls, the third feet extending in only one direction away from intersecting edges of the first and second walls, the third feet being configured to stack one chair upon another, the third feet being configured to space the first and second walls above the underlying surface. ### Claim 3 (depends on 1) The chair of claim 1 wherein the first walls include upper and lower edges providing a first depression and a second depression and further comprising third spaced feet extending away from a rim of the first and second walls, the third feet being configured to place the first and second depressions at different distances fro the underlying surface in response to orientation of the rim. ### Claim 4 (depends on 3) The chair of claim 3 wherein the third feet provide a shank connected to the rim and being of predetermined cross-sectional area, the shank having a terminal end, the terminal end being a smooth curvilinear point. ### Claim 5 (depends on 1) The chair of claim 1 wherein the first feet comprise first rails extending along the first wall from adjacent one edge of the first wall to adjacent an opposite edge of the first wall and wherein the second feet comprise second rails extending along the second wall from adjacent one edge of the second wall to adjacent an opposite edge of the second wall. ### Claim 6 (depends on 5) The chair of claim 5 wherein the first rails are substantially parallel to one another. ### Claim 7 (depends on 6) The chair of claim 6 wherein the second rails are substantially parallel to one another. ### Claim 8 A chair for supporting reinforcing elements in a concrete pour on a underlying surface, comprising a rim including first walls, second walls intersecting the first walls and a cavity between the walls, the walls including outwardly facing depressions configured to support a reinforcing element, the first walls including a pair of spaced edges providing depressions configured t support a reinforcing element, the walls including a length, width and height of different linear extent; the depressions being configured to support a reinforcing element at three different distances from the underlying surface in response to orientation f the rim; and feet on the rim ex ending away from different sides of the rim, the feet and depressions being configured to support a reinforcing element at a plurality of different distances from the underlying surface in a tilt wall pour mode, the feet and depressions being configured to support a reinforcing element at a plurality of different spacings from the underlying surface in a foundation pour mode in response to different orientations of the rim; wherein the feet comprise first spaced feet adjoining and extending generally perpendicularly away from only one of the first walls and second spaced feet adjoining and extending generally perpendicularly away from only one of the second walls, the first feet being configured to raise the first wall above the underlying surface and the second feet being configured to raise the second wall above the underlying surface in a different orientation of the rim. ### Claim 9 A chair for supporting reinforcing elements in a concrete pour on a underlying surface, comprising a rim including first walls, second walls intersecting the first walls and a cavity between the walls, the walls including outwardly facing depressions configured to support a reinforcing element, the first walls including a pair of spaced edges providing depressions configured t support a reinforcing element, the walls including a length, width and height of different linear extent; the depressions being configured to support a reinforcing element at three different distances from the underlying surface in response to orientation of the rim; and feet on the rim extending away from different sides of the rim, the feet and depressions being configured to support a reinforcing element at a plurality of different distances from the underlying surface in a tilt wall pour mode, the feet and depressions being configured to support a reinforcing element at a plurality of different spacings from the underlying surface in a foundation tour mode in response to different orientations of the rim; wherein the first feet comprise first rails extending along t first wall from adjacent one edge of the first wall to adjacent an opposite edge of the first wall and wherein the second feet comprise second rails extending along the second wall from adjacent one edge of the second wall to adjacent an opposite edge of the second wall. ### Claim 10 A chair for supporting reinforcing elements in a concrete pour on an underlying surface, comprising a rim including first walls, second walls intersecting the first walls and a cavity between the walls, the walls including outwardly facing depressions configured to support a reinforcing element, the first walls including a pair of spaced edges providing depressions configured t reinforcing element, the walls including a length, width and height of different linear extent; the depressions being configured to support a reinforcing element at three different distances from the underlying surface in response to orientation if the rim; and feet on the rim extending away from different sides of the rim, the feet and depressions being configured to support a reinforcing element at a plurality of different distances from the underlying surface in a tilt wall pour mode, the feet and depressions being configured to support a reinforcing element at a plurality of different spacings from the underlying surface in a foundation pour mode in to different orientations of the rim; wherein the plurality of different distances comprise three different distances and wherein the plurality of different spacings comprise three different spacings. ### Claim 11 A chair for supporting reinforcing elements in a concrete pour on a underlying surface, comprising a rim including first walls, second walls intersecting the first walls and a cavity between the walls, the walls including outwardly facing depressions configured to support a reinforcing element, the first walls including a pair of spaced edges providing depressions configured t support a reinforcing element, the walls including a length, width and height of different linear extent; the depressions being configured to su port a reinforcing element at three different distances from the underlying surface in response to orientation of the rim; and feet on the rim extending away from different sides of the rim, the feet and depressions being configured to support a reinforcing element at a plurality of different distances from the underlying surface in a tilt wall pour mode, the feet and depressions being configured to support a reinforcing element at a plurality of different spacings from the underlying surface in a foundation pour mode in response to different orientations of the rim; wherein the feet comprise first spaced feet adjoining an extending generally perpendicularly away from one of the first walls and second spaced feet adjoining and extending generally perpendicularly away from one of the second walls, the first feet being configured to raise the first wall above the underlying surface and the second feet being configured to raise the second wall above the underlying surface in a different orientation of the rim. ### Claim 12 (depends on 11) The chair of claim 11 wherein the rim includes a second edge opposite from the first mentioned edges, and further comprising third spaced feet located on the second edge, the third feet extending away from the rim, the third feet being perpendicular to the fir t and second feet, the third feet being configured to stack one hair upon another. ### Claim 13 (depends on 12) The chair of claim 12 wherein the third feet provide a shank connected to the rim and being of predetermined cross-sectional area, the shank having a terminal end of cross-sectional area less than the predetermined cross-sectional area, the terminal end being a point. ### Claim 14 (depends on 11) The chair of claim 11 wherein the feet provide a shank connected to the rim and being of given cross-sectional area, the shank having a terminal end of substantially smaller cross-sectional area than the shank. ### Claim 15 (depends on 11) The chair of claim 11 wherein the distances are of a diff ent length than the spacings. ### Claim 16 (depends on 11) The chair of claim 11 further comprising spaced third feet located at a junction of the first and second walls, the third feet extending in only c ne direction away from intersecting edges of the first and second walls, the third feet being configured to stack one chair upon another, the third feet being configured to space the first and second walls above the underlying surface. ### Claim 17 (depends on 11) The chair of claim 11 wherein the first walls include upper and lower edges providing a first depression and a second depression and further comprising third spaced feet extending away from a rim of the first and second walls, the third feet being configured to place the first and second depressions at different distances from the underlying surface in response to orientation of the rim. ### Claim 18 A chair for supporting reinforcing elements in a concrete pour on an underlying surface in a foundation pour mode and in a tilt wall pour mode, comprising a rim including first walls, second walls intersecting the first walls and a cavity between the walls, the walls having outwardly facing depressions configured to support a reinforcing element, the rim including a pair of spaced edges; spaced first feet on only a first of the spaced edges and configured to position the first edge away from the underlying surface when the first feet adjoin the underlying surface, the first walls having a depression configured to support a reinforcing element when the first feet adjoin the underlying surface; spaced second feet on only a first of the first walls, the second feet being configured to position the first of the first walls away from the underlying surface when the second feet adjoin the underlying surface, a second of the first walls having a depression configured t support a reinforcing element when the second feet adjoin the underlying surface. ### Claim 19 (depends on 18) The chair of claim 18 wherein a first of the first walls includes a depression configured to support a reinforcing element in foundation pour when the second feet are in an orientation with the second feet spaced from the underlying surface. ### Claim 20 (depends on 18) The chair of claim 18 wherein the first wall includes a depression between the first feet configured to support a reinforcing element in a foundation pour when the first feet are in an orientation with the first feet spaced from the underlying surface.